Ore-feeder



(No Model.)

E. COLEMAN; No. 239,449.r Ore Feeder;

I Patented Marc-5291881 vEZRA COLEMAN, OF SAN PATENT rrIcE.

FRANCISCO, CALIFORNIA.

`ORE-FEEDER.

SPECIFICATION forming part of Letters Patent No. 239,449, dated March29, 188.1.

l Application filed May 24, 1880.

" To all whom it may concern:

Be it known that I, EZRA COLEMAN, of the city and county of SanFrancisco, in the State of California, have invented an Improved Ore-Feeder; and I do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings.

My invention relates to an improved machine for feeding ore and otherVsubstances to crushing and grinding mills; and it consists of astationary hopper mounted above an adiustabletray, in combination with aswinging `push-plate, which is operated by the drop of the stamp topress the ore forward through the tray, all as hereinafter more fullydescribed.

Referring to the drawings, Figure l is a side sectional elevation of thefeeder, showing the hopper, tray, push-plate, lever, and interveningmechanism. Fig. 2 is a plan view of the tray. Fig. 3 is a side sectionalview ofthe tray.

A is a stationaryv hopper, which is mounted in a suitable frame, B.

C is the tray, which is mounted below the hopper, and upon which the oreor other substance contained in the hopper rests in the usual way. Thistray is suspended at its front end by means of screw-bolts d, which passthrough the front horizontal timbers of the frame, and upon which nuts fare turned. The rear end is supported in a like manner by screw-bolts g,which pass Adown through the horizontal timbers H ot' the frame andthrough eyes t' on the rear corners of the tray. A nut, j, is turned onthese screw-bolts above the eyes, and another, 7c, below them, so thatthe eyes can be clamped between them when it is desired to x the rearend of the tray in place.

lBy turning these nuts up or down the height of the rear end of the traycan be adjusted, while the nutsf enable me to adjust the height of thefront end. 1 can thus set the tray at any desired angle or inclination,as may be found necessary. The front end of the tray I provide with anangular apron or lip, p, which directs the ore into the battery after itpasses the bend or angle, and prevents it from scattering.

Just below the rea-r side of the hopper I hinge or hang a plate, q, fromthe upper edge (No model.)

of the sides of the tray, so that it will hang down across the tray, itslower end being free. To the middle of this plate l attach a rod, r,which extends back and passes through the rear end of the tray. On therearwardly-projecting portion of this rod is a spring, s, which isconfined by a nut, t, on the end of the rod. The rod r has a loop orhole, u, in it, in which the end of one arm of a bell-crank lever, o,enters. The angle of this lever is pivoted diward horizontally. Ascrew-rotl,,wyisjointed to the front end of thiswhorizoii'tal rod, andon this screw-rgd the'rear end of the main oper` ating-lever ai?" whichreceives the stroke of the tappet, is secured by set-nuts y, so that theheight ofthe outer end of the lever canbe adjusted by raising orlowering the rear end on the screw-rod, thus regulating the force of theblow on the lever. When the outer end ofthe lever is depressed by thestroke of the tappet the bell-crank lever forces the rod r forward,compressing the spring s and pressing the plate q forward at the sametime. The ore, which rests upon the tray and against the plate, is thuspressed forward by the plate, so that a small portion in advance isforced over the'angle and falls into the battery, and the quantity isregulated by the length of the movement of the plate. When the stamplifts again the spring s draws the plate back again and `sets the leverready for the next drop.

A slight'concavity is formed in the bottom of the tray under the movingedge of the pushplate q, so that no opening is presented under the edgeof the plate for any particles of ore to get into as the plate movesback and forth. The plate qcan either be hung from the sides of thetray, or it can be hinged to the lower edge of the hopper, and Vit wouldwork the same way in either case g but I prefer to hang it on the sidesof the tray, as it can then be made of cast-iron and finished at thesame time with the tray in the foundry. A very slight motion of theplate is all that is required to move the ore forward, and by increasingthe angle of the tray by means of the screwrods the feed can be made assensitive as desired. In fact, the several adjustments which thismachine is provided with renders it at once the simplest and mosteffective feeder in rectly above, and its opposite arm extendvsfotfruse, while its'ext'reme simplicity renders it the by the bell-cranklever o and tappet-l'ever x, 1o

most; economical and durable of any feeder th at substantially asspecified.

I am familiar with. In Witness whereof I have hereunto set my Havingthus described my invention, what hand and seal.

I claim, and desire to secure by Letters Patent, EZR'A COLEMAN [L s lThe hopper A and tray C, in combination l Witnesses:

with Iche suspended push-plate q, with its rod CEAS. D. WHEAT,

1" and spring s, said push-plete being operated WM. F. CLARK.

